Shoe sole

Abstract

The utility model discloses a sole which comprises a half sole functional layer and a sole body which are overlapped up and down, the position, corresponding to the half sole, of the sole body is a half sole area, the side, corresponding to the inner side of the instep, of the sole body is an inner side, the side, corresponding to the outer side of the instep, of the sole body is an outer side, and the half sole area comprises a half sole inner area located on the inner side and a half sole outer area located on the outer side. The hardness of the half sole functional layer is larger than that of the sole body, and the half sole functional layer covers the half sole inner area, so that the half sole of the sole is high inside and low outside. According to the shoe sole, on one hand, excessive extorsion and abduction of a foot can be restrained when the shoe sole is pedaled away from the ground, so that the occurrence probability of sport injuries is reduced, and on the other hand, the ground pedaling efficiency can be improved, and the sport performance is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of footwear, in particular to a shoe sole. BACKGROUND

[0002] When running landing, the body weight and inertia, the human body will produce 2-3 times the body weight impact force to the ground, and the ground will give the human body the same size, opposite direction of the reaction force. The reaction force from the ground will bring negative effects to the skeletal joints, leading to stress fracture, joint wear and other problems, and affect the sports performance.

[0003] At present, the design of sports shoes mainly focuses on improving the shock absorption of the shoe sole to buffer the ground impact when the foot lands, so as to reduce the ground impact force in the vertical direction of the knee joint in the process of movement, reduce the impact on the knee joint, and reduce the occurrence of sports injuries. For example, the Chinese utility model patent with publication number CN220694522U discloses a kind of shock-absorbing rebound shoe sole and shoes, which provides stable support for rear palm by setting shock-absorbing block in rear palm, to effectively reduce the impact force of foot heel landing on the ground.

[0004] Running is divided into: forefoot landing, rear heel landing and full foot landing according to different landing modes. No matter which landing mode, the posture of kicking off the ground is basically the same, which is to kick off the ground at the medial side of the forefoot, which is easy to intensify the foot eversion and abduction when kicking off, leading to increased action deformation and increased incidence of sports injuries, and reduced sports performance. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a kind of shoe sole to reduce the foot eversion and abduction when forefoot kicks off the ground.

[0006] To achieve the above-mentioned purpose, the technical scheme provided by the utility model is as follows:

[0007] A shoe sole, comprising a forefoot functional layer and a shoe sole body stacked vertically, the shoe sole body has a forefoot area corresponding to the forefoot, an inner side corresponding to the medial side of the instep, and an outer side corresponding to the lateral side of the instep, the forefoot area includes a forefoot inner area on the inner side and a forefoot outer area on the outer side, the hardness of the forefoot functional layer is greater than that of the shoe sole body, and the forefoot functional layer covers the forefoot inner area, so that the inner side of the forefoot of the shoe sole is high and the outer side is low.

[0008] Preferably, the thickness of the forefoot functional layer gradually decreases from the inner side to the outer side of the shoe sole.

[0009] Preferably, the slope difference between the inner and outer sides of the forefoot functional layer is 1.8mm-2.5mm.

[0010] Preferably, the difference between the Shore hardness of the forefoot functional layer and the shoe sole body is 2-5C.

[0011] Preferably, the Shore hardness of the forefoot functional layer is 42-45C, and the Shore hardness of the sole body is 40-42C.

[0012] Preferably, the forefoot inner region at least covers the areas corresponding to the first toe, second toe, first metatarsal bone, second metatarsal bone, and third metatarsal bone.

[0013] Preferably, the sole further includes a support piece disposed within the sole body.

[0014] Preferably, the sole body comprises: a first midsole and a second midsole stacked on top of each other, the support plate being disposed between the first midsole and the second midsole, and the hardness of the forefoot functional layer being at least greater than the hardness of the first midsole.

[0015] Preferably, the main body of the shoe sole has upwardly extending sidewalls on its periphery.

[0016] The beneficial effects of this utility model by adopting the above technical solution are as follows: the sole of this utility model, by overlapping and covering the inner area of ​​the forefoot of the sole body with a forefoot functional layer that is harder than the main body of the sole, can, on the one hand, suppress excessive external rotation and abduction of the foot when pushing off the ground, thereby reducing the probability of sports injuries, and on the other hand, improve the efficiency of pushing off the ground and improve athletic performance. Attached Figure Description

[0017] Figure 1 This diagram illustrates the changes in ground reaction force when running with the heel striking the ground.

[0018] Figure 2 This diagram shows the change in the position of the center of pressure on the foot during the landing process of a regular shoe sole.

[0019] Figure 3 This is a top view (right foot) of the sole body of a preferred embodiment of the present invention.

[0020] Figure 4 This is a top view (right foot) of the sole of a preferred embodiment of the present invention.

[0021] Figure 5 for Figure 4 Schematic diagram of the sectional view along the AA direction.

[0022] Figure 6 for Figure 3 A diagram showing the change in the position of the foot's pressure center during the foot's contact with the ground.

[0023] The components are: 1. Forefoot area; 11. Inner forefoot area; 12. Outer forefoot area; 2. Forefoot functional layer; 3. Outsole body; 31. First midsole; 32. Second midsole; 4. Support plate; 5. Sidewall. DETAILED DESCRIPTION

[0024] The utility model makes further explanation in combination with the drawings and specific implementation.

[0025] Figure 1 The ground reaction force changes from the rear heel landing to the front foot leaving the ground are depicted. The first peak value in the early landing stage is about 2-3 times of the body weight, and the second peak value in the later landing stage reaches 3-4 times of the body weight. The second peak value is rarely considered in the current sports shoe design and development, especially the concentrated position of the second peak value. The second peak value is mainly concentrated in the medial side of the forefoot, the first, second and third metatarsal bones and the big toe. When leaving the ground, the foot is prone to excessive supination and abduction. As shown in the figure, it can be known from the plantar pressure plate that there is obvious stress concentration in the medial side of the forefoot of the shoe sole, which will cause the comfort to decrease and even cause metatarsal fracture. Therefore, the utility model aims to provide a shoe sole which can reduce the supination and supination angle, reduce the injury probability, better utilize the second peak value, reduce the ground lifting time, increase the ground lifting speed and improve the sports performance. Figure 2

[0026] In combination Figures 3 to 5 , the shoe sole of the utility model comprises a forefoot functional layer 2 and a shoe sole body 3 which are stacked up and down. The shoe sole body 3 corresponds to a forefoot area 1 in position, one side of the medial side of the instep, one side of the lateral side of the instep, the forefoot area 1 comprises a forefoot medial area 11 and a forefoot lateral area 12. The forefoot functional layer 2 covers the forefoot medial area 11, and the hardness of the forefoot functional layer 2 is greater than that of the shoe sole body 3. The utility model sets the forefoot functional layer 2 in the forefoot medial area 11 of the shoe sole body 3, so that the forefoot of the shoe sole is high in the medial side and low in the lateral side, and the special structure that the medial side of the forefoot is relatively hard can prevent the foot from excessive abduction and supination when leaving the ground, thereby reducing the injury probability, and can fully utilize the second peak value, reduce the ground lifting time, improve the ground lifting efficiency and thereby improve the sports performance.

[0027] In a preferred embodiment of the utility model, the thickness of the forefoot functional layer 2 gradually decreases from the medial side of the shoe sole to the lateral side, so as to form a slope difference a of the forefoot functional layer 2. And the forefoot of the shoe sole is smooth in transition, has no foreign body sensation and ensures comfortable foot feeling.

[0028] The slope difference of the forefoot functional layer 2 on the medial side and the lateral side can be adjusted according to different application scenarios. In the embodiment, the shoe sole is applied to a carbon plate running shoe, and the slope difference a of the forefoot functional layer 2 on the medial side and the lateral side is 1.8mm-2.5mm.

[0029] Preferably, the Shore hardness difference between the forefoot functional layer 2 and the shoe sole body 3 is 2-5C.

[0030] ​Since the first and second toes and the first, second and third metatarsal bones are the main force bearing parts during the process of kicking off the ground, in order to obtain the best effect, the front-palm inner area 11 of the embodiment covers at least the areas corresponding to the first toe, the second toe, the first metatarsal bone, the second metatarsal bone and the third metatarsal bone.

[0031] The sole is generally composed of two parts, i.e. a midsole and an outsole. The midsole is the main part of the sole, which is usually made of foam, EVA, MD, etc. The outsole is the edge part of the sole, which is usually made of rubber, PU, PVC, etc. The sole body 3 of the utility model refers to the midsole. In the embodiment, the sole body 3 comprises a first midsole 31 and a second midsole 32 which are stacked one above the other. The first midsole 31 and the second midsole 32 can be made of ETPU or EVA foaming material by supercritical process. The hardness of at least the first midsole 31 is smaller than that of the front-palm functional layer 2, and the Shore hardness thereof is preferably 40-42C. The front-palm functional layer 2 can be made of the same material as the sole body 3 or non-foaming material, and the Shore hardness thereof is preferably 42-45C.

[0032] When the front-palm functional layer 2 and the sole body 3 are made of the same material, they can be integrally formed in a mold.

[0033] The first midsole 31 and the second midsole 32 of the embodiment are provided with a support sheet 4 therebetween. The support sheet 4 is used to enhance the stability and anti-twist performance of the running shoes. The support sheet 4 can be made of carbon plate, nylon plate, TPU elastic plate, etc.

[0034] The side of the sole body 3 can also be provided with a side wall 5 extending upward to play a role of lateral support and protection.

[0035] In combination with Figure 6 , through the influence of the new structure, the force on the forefoot is more balanced during running (the runner is the same, and the running speed is consistent), and there is no phenomenon of excessive concentration of stress.

[0036] Although the utility model is specifically shown and introduced in combination with the preferred embodiment, those skilled in the art should understand that various changes can be made to the utility model in form and details without departing from the spirit and scope of the utility model defined in the appended claims, and all the changes are within the protection scope of the utility model.

Claims

1. A shoe sole, characterized by The sole comprises a front-palm functional layer (2) and a sole body (3) which are superimposed, the sole body (3) has a front-palm area (1) corresponding to the front-palm, an inner side corresponding to the inner side of the instep, and an outer side corresponding to the outer side of the instep, The hardness of the front-palm functional layer (2) is greater than that of the sole body (3), the front-palm functional layer (2) covers the front-palm inner area (11), so that the inner area of the front-palm is higher and the outer area is lower.

2. The shoe sole of claim 1, wherein, The thickness of the front-palm functional layer (2) gradually decreases from the inner side to the outer side.

3. The shoe sole of claim 2, wherein, The slope difference between the inner side and the outer side of the front-palm functional layer (2) is 1.8mm-2.5mm.

4. The shoe sole of claim 1, wherein, The difference between the Shore hardness of the front-palm functional layer (2) and the sole body (3) is 2-5C.

5. The shoe sole of claim 4, wherein, The Shore hardness of the front-palm functional layer (2) is 42-45C, and the Shore hardness of the sole body (3) is 40-42C.

6. The shoe sole according to any one of claims 1 to 5, characterized in that The front-palm inner area (11) covers at least the areas corresponding to the first toe, the second toe, the first metatarsal bone, the second metatarsal bone and the third metatarsal bone.

7. The shoe sole according to any one of claims 1 to 5, characterized in that The sole further comprises a support sheet (4) arranged in the sole body (3).

8. The shoe sole of claim 7, wherein, The sole body (3) comprises a first insole (31) and a second insole (32) which are superimposed, the support sheet (4) is arranged between the first insole (31) and the second insole (32), and the hardness of the front-palm functional layer (2) is at least greater than that of the first insole (31).

9. The shoe sole according to any one of claims 1 to 5, characterized in that The side of the sole body (3) is provided with a side wall (5) extending upward.

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